Hydrocortisone hemisuccinate (Hydrocortisone Upjohn) was supplied as a powder in 100 mg vials to be reconstituted with 2 ml of sterile water diluent. The placebo was saline serum supplied as 10 ml ampoules. The study drugs were administered according to two protocols. In the 200-mg group, patients received an intravenous bolus of 50 mg of hydrocortisone every six hours for seven days associated with a continuous infusion of placebo for five days. In the 300-mg group, patients received an initial bolus of 100 mg of hydrocortisone followed by a continuous infusion of 300 mg per day for five days associated with a bolus of placebo every six hours for seven days. In the two groups, hydrocortisone was stopped abruptly at the end of treatment. The investigators had the choice or resuming hydrocortisone at the end of the fifth day if deemed necessary.